Power battery welding point detection method, system and device

Abstract

The present application belongs to the technical field of welding, and particularly relates to tracking of a weld, and more particularly to a power battery welding point detection method, system and device, wherein the power battery welding point detection method comprises: a control module acquiring the size of all welding points through image recognition, and acquiring the position of the welding points; the control module constructing a detection path according to the position of the welding points, and selecting a corresponding probe according to the size of the welding points; the control module controls the probe to move according to the detection path, so as to detect all the welding points; wherein the method for acquiring the position of the welding points comprises: the control module constructs a coordinate system, the projections of all the welding points are located in the first quadrant of the coordinate system, and the coordinates of all the welding points in the coordinate system are acquired, thereby achieving detection of all the welding points according to the detection path, orderly detection of all the welding points, avoidance of repeated detection of the welding points, and improvement of the detection efficiency of the welding points.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of welding, and particularly relates to tracking of a weld, and particularly relates to a power battery welding point detection method, system and device. BACKGROUND

[0002] There are various welding points on a power battery. In related technologies, different probes need to be carried and replaced for detection of welding points of different sizes, and due to different distributions of the welding points, all the welding points need to be detected in the detection process. Chaotic traversal of all the welding points will cause the detection time of all the welding points to be too long, resulting in low detection efficiency.

[0003] Therefore, due to the technical problem of long detection time and low detection efficiency caused by chaotic traversal of all the welding points, a power battery welding point detection method, system and device need to be designed.

[0004] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered to constitute information of the prior art. SUMMARY

[0005] The present application provides at least a power battery welding point detection method, system and device.

[0006] In a first aspect, the present application provides a power battery welding point detection method, comprising:

[0007] The control module acquires the sizes of all the welding points and the positions of the welding points through image recognition.

[0008] The control module constructs a detection path according to the positions of the welding points and selects corresponding probes according to the sizes of the welding points.

[0009] The control module controls the probes to move according to the detection path to detect all the welding points.

[0010] The method of acquiring the positions of the welding points comprises:

[0011] The control module constructs a coordinate system, the projections of all the welding points are located in the first quadrant of the coordinate system, and the coordinates of all the welding points in the coordinate system are acquired.

[0012] In an optional implementation, the method of constructing a detection path according to the positions of the welding points comprises:

[0013] In the same size of the welding spot, the control module judges the number of center points in the same X axis and the number of center points in the same Y axis according to the coordinates of the center points of each welding spot. If the number of center points in the same Y axis is more than the number of center points in the same X axis, the detection path is formed by moving from the starting point in the longitudinal S path, and the next welding spot of the current welding spot in the detection path is the welding spot whose center point X axis coordinate difference is the smallest and whose center point distance is the smallest.

[0014] If the number of center points in the same X axis is more than the number of center points in the same Y axis, the detection path is formed by moving from the starting point in the horizontal S path, and the next welding spot of the current welding spot in the detection path is the welding spot whose center point Y axis coordinate difference is the smallest and whose center point distance is the smallest.

[0015] If the number of center points in the same X axis is the same as the number of center points in the same Y axis, the detection path is formed by moving from the starting point in the horizontal S path or the longitudinal S path. If the horizontal S path is moved, the next welding spot of the current welding spot in the detection path is the welding spot whose center point Y axis coordinate difference is the smallest and whose center point distance is the smallest. If the longitudinal S path is moved, the next welding spot of the current welding spot in the detection path is the welding spot whose center point X axis coordinate difference is the smallest and whose center point distance is the smallest.

[0016] In an optional embodiment, if the sizes of all welding spots are the same and the sizes of the welding spots are adapted to the probe, the starting point of the detection path corresponding to all welding spots is: the shortest distance between the point closest to the Y axis on each welding spot and the Y axis is obtained by the control module, and the welding spot with the shortest distance is taken as the starting point of the detection path. If there are at least two welding spots with the shortest distance, the welding spot farther from the X axis is taken as the starting point.

[0017] In an optional embodiment, if there are at least two sizes of welding spots among all welding spots, and all kinds of welding spots are adapted to the corresponding probe, the control module classifies all welding spots by welding spot size at this time, and each kind of welding spot has a corresponding detection path. The distance between the point closest to the Y axis on each welding spot and the Y axis is obtained by the control module, and the welding spot with the shortest distance is taken as the starting point. If there are at least two welding spots with the shortest distance, the welding spot farther from the X axis is taken as the starting point. The detection path corresponding to the welding spot category at the starting point is taken as the first detection path, and after the end of the detection path, the detection path corresponding to the next kind of welding spot closest to the last welding spot of the detection path is taken as the next detection path, until all kinds of welding spot corresponding detection paths are traversed.

[0018] In an optional embodiment, if there are several welding points with sizes less than the preset minimum size among all the welding points, the control module determines the distance between two adjacent welding points with sizes less than the preset minimum size, and if there is a distance greater than the preset maximum distance, the control module sends an alarm message, and if not, all the welding points with sizes less than the preset minimum size are regarded as one welding point for detection, and the remaining other welding points construct corresponding detection paths.

[0019] In an optional embodiment, if there are welding points with sizes greater than the preset maximum size among all the welding points, the control module controls the probe corresponding to the preset maximum size of the welding point to detect the welding point with the size greater than the preset maximum size, and in the process of detecting the welding point with the size greater than the preset maximum size, the probe performs S-shaped scanning on the surface of the welding point to cover the welding point, and the control module constructs detection paths corresponding to welding points of different sizes to traverse all the welding points.

[0020] In a second aspect, the embodiments of the present disclosure further provide a power battery welding point detection system, comprising:

[0021] An acquisition module configured to acquire the sizes of all the welding points through image recognition, and acquire the positions of the welding points;

[0022] A path module configured to construct detection paths according to the positions of the welding points, and select corresponding probes according to the sizes of the welding points.

[0023] In a third aspect, the embodiments of the present disclosure further provide a computer readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the power battery welding point detection method.

[0024] In a fourth aspect, the embodiments of the present disclosure further provide a computer program product comprising a computer program / instruction, which, when executed by a processor, implements the steps of the power battery welding point detection method.

[0025] In a fifth aspect, the embodiments of the present disclosure further provide a power battery welding point detection device, comprising:

[0026] A control module, and a moving mechanism, a rotating mechanism and probes of different sizes electrically connected to the control module;

[0027] The rotating mechanism is arranged on the moving mechanism;

[0028] The probe is arranged on the rotating mechanism, and the control module is adapted to control the rotating mechanism to rotate so that the probe of the corresponding size faces downward;

[0029] The control module is adapted to control the downward probe to detect the welding point;

[0030] The control module is configured to obtain a detection path by using the power battery welding point detection method to control the mobile mechanism to drive the rotating mechanism to move, so that the corresponding probe detects the welding point.

[0031] The power battery welding point detection method has the advantages that the control module obtains the sizes of all welding points and the positions of the welding points through image recognition, constructs a detection path according to the positions of the welding points, and selects corresponding probes according to the sizes of the welding points; the control module controls the probes to move according to the detection path to detect all the welding points; the method for obtaining the positions of the welding points includes constructing a coordinate system by the control module, and the projections of all the welding points are located in the first quadrant of the coordinate system, and the coordinates of all the welding points in the coordinate system are obtained, so that all the welding points are detected according to the detection path, all the welding points are detected in order, repeated detection of the welding points is avoided, and the detection efficiency of the welding points is improved.

[0032] Other features and advantages of the present application will be set forth in the descriptions below, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the description and claims hereof as well as the appended drawings.

[0033] In order to make the above objectives, features and advantages of the present application more apparent, a preferred embodiment is specifically described in the following with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0035] Figure 1 A flow chart of a power battery welding point detection method provided by the embodiment of the present disclosure is shown in the figure;

[0036] Figure 2 A longitudinal S-path moving schematic diagram provided by the embodiment of the present disclosure is shown in the figure;

[0037] Figure 3 A transverse S-path moving schematic diagram provided by the embodiment of the present disclosure is shown in the figure;

[0038] Figure 4 Two size welding point detection path schematic diagrams provided by the embodiment of the present disclosure are shown in the figures;

[0039] Figure 5A same row and same column welding point distribution schematic diagram provided by the embodiment of the present disclosure;

[0040] Figure 6 A structural schematic diagram of a power battery welding point detection device provided by the embodiment of the present disclosure.

[0041] In the figure:

[0042] 1 rotating mechanism, 2 connecting piece, 3 rotating disc, 4 probe. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] As used herein, the phrases "in one embodiment", "according to one embodiment", "in some embodiments", and the like generally mean the fact that a particular feature, structure, or characteristic that follows the phrase can be included in at least one embodiment of the present disclosure. Therefore, the particular feature, structure, or characteristic can be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example", "exemplary", and the like are used as an example, instance, or illustration. Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily interpreted as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example", "exemplary", and the like is intended to present the concept in a specific manner.

[0045] There are welding points of various sizes on the power battery. The inventor found that in the related art, the detection trajectory is disordered when detecting the welding points, which can cause many welding points to pass repeatedly, thereby reducing the detection efficiency of the welding points. In addition, due to the different sizes of the welding points, the probe is repeatedly switched or replaced for detection during the detection process, and the same probe is repeatedly switched to be used, that is, the detection process of the welding points of the same size is mixed with the detection of welding points of other sizes, so that the probe is repeatedly switched or replaced during the detection process, thereby reducing the detection efficiency.

[0046] The defects of the above solutions are the results obtained by the inventor after practice and careful study, and therefore, the discovery process of the above problems and the solutions proposed by the present disclosure for the above problems in this paper should be the contribution of the inventor to the present disclosure during the process of the present disclosure.

[0047] It should be noted that like reference numerals and characters refer to like elements throughout the several views of the drawings, and that, unless otherwise indicated, like reference numerals and characters in different figures indicate like elements therein.

[0048] Some embodiments of the present application will now be described in detail in connection with the accompanying drawings. The embodiments described below and features in the embodiments can be combined with each other, if not in conflict.

[0049] As shown in the drawings, Figure 1 At least one disclosed embodiment provides a power battery welding point detection method, including: a control module acquires the size of all welding points through image recognition, and acquires the position of the welding points; the control module constructs a detection path according to the position of the welding points, and selects a corresponding probe 4 according to the size of the welding points; the control module controls the probe 4 to move according to the detection path to detect all welding points; wherein the method of acquiring the position of the welding points includes: the control module constructs a coordinate system, the projections of all welding points are located in the first quadrant of the coordinate system, and the coordinates of all welding points in the coordinate system are acquired, thereby realizing detection of all welding points according to the detection path, orderly detection of all welding points, avoiding repeated detection of welding points, and improving the detection efficiency of welding points.

[0050] In this embodiment, the probe 4 can use a high-precision magnetic field sensor to detect the welding points to acquire a detection curve to judge the welding effect of the welding points. The high-precision magnetic field sensor can be, but is not limited to, AK8963. Different probes 4 have different detection ranges and can correspond to welding points of different sizes to use corresponding probes 4 to detect more accurately in the welding point detection process.

[0051] In this embodiment, only the corresponding probe 4 works in the detection process, and the rest of the probes 4 do not work.

[0052] In this embodiment, the size can refer to the shape and area of the welding points, and the same size means that the shape and area of the welding points are the same.

[0053] In this embodiment, only one size of welding points will exist in the same detection path, so that only one type of probe 4 will be used in the same detection path, avoiding the increase of detection time caused by switching or replacing the probe 4, and avoiding the reduction of detection efficiency.

[0054] In this embodiment, the construction of the detection path enables the orderly detection of all welding points, avoiding repeated passing through the same welding point, and increasing the detection efficiency of the welding points.

[0055] In this embodiment, when constructing the coordinate system, the side of the power battery with the weld points can be used as the reference plane. The projections of all weld points are located in the reference plane. The coordinate system is constructed on the reference plane so that the projections of all weld points are completely located in the first quadrant of the coordinate system. This makes it easier to calculate the distance of the weld points from the Y-axis and to more easily determine the starting point of the detection path.

[0056] In one optional implementation, the method for constructing a detection path based on the location of the solder joint includes: as follows Figure 2 As shown, among solder joints of the same size, the control module determines the number of center points on the same X-axis and the number of center points on the same Y-axis based on the coordinates of the center points of each solder joint. If the number of center points on the same Y-axis is greater than the number of center points on the same X-axis, the detection path is to move longitudinally along the S-path from the starting point, traversing all solder joints to form the detection path. The next solder joint in this detection path is the one with the smallest difference in the X-axis coordinates of the center points and the smallest distance between the center points.

[0057] like Figure 3 As shown, if the number of center points on the same X-axis is greater than the number of center points on the same Y-axis, the detection path is to move horizontally along the S-path from the starting point, traversing all solder joints to form the detection path. The next solder joint in the current solder joint in this detection path is the one with the smallest difference in the Y-axis coordinates of their center points and the smallest distance between their center points.

[0058] If the number of center points on the same X-axis is the same as the number of center points on the same Y-axis, the detection path is to move from the starting point along a horizontal S-path or a vertical S-path, traversing all solder joints to form the detection path. If moving along a horizontal S-path, the next solder joint in the detection path is the one with the smallest difference in the Y-axis coordinates of its center points and the smallest distance between its center points. If moving along a vertical S-path, the next solder joint in the detection path is the one with the smallest difference in the X-axis coordinates of its center points and the smallest distance between its center points.

[0059] In this embodiment, the center point coordinates of each solder joint are obtained. Based on the center point coordinates, the number of center points sharing the same X-axis and the number sharing the same Y-axis are obtained, such as... Figure 5 As shown, for example, if there are solder joints A (1,2), B (1,3), C (1,4), D (3,3), and E (5,3), then solder joints A, B, and C have the same X-axis coordinate, which means that these three solder joints are in the same column, and solder joints B, D, and E have the same Y-axis coordinate, which means that these three solder joints are in the same row.

[0060] In this embodiment, the number of center points on the same Y-axis is greater than the number of center points on the same X-axis, indicating that there are more solder joints in the same column. Moving along the longitudinal S-path avoids having too many solder joints in half of an S-path, thus preventing two solder joints in sequence from affecting the detection process.

[0061] In this embodiment, the number of center points on the same X-axis is greater than the number of center points on the same Y-axis, indicating that there are more solder joints in the same row.

[0062] In this embodiment, if the distance between two sequential solder joints in the same detection path is less than the preset minimum detection distance, after the current solder joint is detected, the probe 4 moves to the next solder joint and pauses for a preset time before detection, so as to avoid the residual magnetic field from the previous solder joint detection affecting the detection of the next solder joint.

[0063] In one optional implementation, if all solder joints are of the same size and the size of the solder joints is compatible with probe 4, then the starting point of the detection path corresponding to all solder joints is: the vertical distance between the point closest to the Y-axis on each solder joint and the Y-axis is obtained through the control module, i.e. Figure 2 The length of h is determined by taking the shortest solder joint as the starting point of the detection path. If there are at least two solder joints with the shortest distance, the solder joint with the greater distance from the X-axis is taken as the starting point.

[0064] like Figure 4 As shown, in one optional implementation, if there are at least two sizes of solder joints among all solder joints, and all types of solder joints are compatible with the corresponding probe 4, the control module classifies all solder joints according to their size. Each type of solder joint has a corresponding detection path. The control module obtains the distance between the point closest to the Y-axis on each solder joint and the Y-axis. The solder joint with the shortest distance is taken as the starting point. If there are at least two solder joints with the shortest distance, the solder joint with the greater distance from the X-axis is taken as the starting point. The detection path corresponding to the type of solder joint at the starting point is taken as the first detection path. After the detection path ends, the detection path corresponding to the other type of solder joint closest to the last solder joint on the detection path is taken as the next detection path, until the detection paths corresponding to all types of solder joints are traversed.

[0065] In the embodiment, if there are at least two kinds of welding spots with different sizes in all the welding spots, and the corresponding probe 4 can directly detect all kinds of welding spots, the two kinds of welding spots with different sizes are classified, the welding spot closest to the Y axis in all the welding spots is obtained, if there are multiple welding spots, the welding spot farthest from the X axis is further determined in the welding spots, the welding spot is taken as the starting point of the detection path corresponding to the kind of welding spot, all the welding spots of the kind of size are traversed through a detection path, the welding spot of another kind of size closest to the end point of the detection path is determined, the welding spot of another kind of size is taken as the starting point of the detection path corresponding to the kind of welding spot, and the cycle is repeated until all kinds of all the welding spots are traversed. Traversing the welding spots of the same kind at a time can reduce the number and frequency of replacement or switching of the probe 4, shorten the detection time, and improve the detection efficiency.

[0066] In an alternative embodiment, if there are welding spots with sizes smaller than the preset minimum size in all the welding spots, the control module determines the distance between two adjacent welding spots with sizes smaller than the preset minimum size, if there is a distance greater than the preset maximum distance, the control module sends an alarm information, if not, all the welding spots with sizes smaller than the preset minimum size are detected as one welding spot, and the remaining other welding spots construct corresponding detection paths.

[0067] In the embodiment, if there are multiple welding spots with sizes smaller than the preset minimum size, and the distribution is relatively dispersed, it indicates that there is a problem in the welding process, and the staff needs to be reminded to overhaul the welding equipment.

[0068] In the embodiment, if there are multiple welding spots with sizes smaller than the preset minimum size, but the welding spots are distributed close to each other, and there are no welding spots with other sizes between the welding spots, it indicates that a special situation may have occurred in the welding process for a period of time, at this time, the welding spots with smaller sizes can be regarded as one large welding spot, which is detected by the probe 4, and the probe 4 directly traverses the welding spots with smaller sizes through an S-shaped path to determine the welding effect.

[0069] In the embodiment, if there are welding spots with sizes smaller than the preset minimum size in all the welding spots, although the distance between two adjacent welding spots with sizes smaller than the preset minimum size is smaller than the preset minimum size, the area surrounded by the welding spots contains welding spots with other sizes, which indicates that the welding equipment has a problem, and the control module sends an alarm information.

[0070] In an optional embodiment, if there is a welding spot with a size greater than the preset maximum size among all welding spots, the control module controls the probe 4 corresponding to the preset maximum size of the welding spot to detect the welding spot with a size greater than the preset maximum size, and in the process of detecting the welding spot with a size greater than the preset maximum size, the probe 4 moves on the surface of the welding spot in an S-shaped scanning manner to cover the welding spot, and the control module constructs a detection path corresponding to each size of the welding spot to traverse all welding spots.

[0071] In the embodiment, when there is a welding spot with a size greater than the preset maximum size, i.e., the welding spot is too large, the welding spot is detected by the probe 4 with the largest detection range, and the probe 4 can move on the surface of the welding spot in an S-shaped trajectory to cover all positions on the surface of the welding spot.

[0072] At least one other disclosed embodiment further provides a power battery welding spot detection system, comprising: an acquisition module configured to acquire the sizes of all welding spots through image recognition, and acquire the positions of the welding spots; a path module configured to construct a detection path according to the positions of the welding spots, and select a corresponding probe 4 according to the sizes of the welding spots.

[0073] In the embodiment, the acquisition module and the path module can be virtual modules, and their functions can be integrated in a control module, an upper computer, or other processing devices.

[0074] At least one other disclosed embodiment further provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the above-mentioned power battery welding spot detection method.

[0075] At least one other disclosed embodiment further provides a computer program product comprising a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned power battery welding spot detection method.

[0076] As shown in Figure 5 At least one other disclosed embodiment further provides a power battery welding spot detection device, comprising: a control module, and a moving mechanism, a rotating mechanism 1, and a plurality of probes 4 electrically connected to the control module; the rotating mechanism 1 is arranged on the moving mechanism; the probe 4 is arranged on the rotating mechanism 1, the control module is adapted to control the rotating mechanism 1 to rotate so that the probe 4 corresponding to the size faces downward; the control module is adapted to control the probe 4 facing downward to detect the welding spot; and the control module is configured to acquire a detection path by using the above-mentioned power battery welding spot detection method to control the moving mechanism to drive the rotating mechanism 1 to move so that the corresponding probe 4 detects the welding spot.

[0077] In the embodiment, the moving mechanism can be a three-axis moving pair to drive the rotating mechanism 1 to move, so that the probe 4 can pass above all the welding points to complete the detection of the welding points.

[0078] In the embodiment, the detection ranges of the probes 4 of different sizes are different to correspond to welding points of different sizes.

[0079] In the embodiment, the rotating mechanism 1 can include the connecting piece 2 and the rotating disc 3, the rotating disc 3 is rotationally arranged on the connecting piece 2, the connecting piece 2 is arranged on the moving mechanism, the surface of the connecting piece 2 is provided with probes 4 of different sizes, the rotating disc 3 can be connected with a motor, and the rotating disc 3 is driven to rotate by the motor, so that the different probes 4 can all be rotated to the downward state to detect the welding points below.

[0080] In summary, the method for detecting welding points of a battery, comprising: a control module acquires the sizes of all the welding points through image recognition, and acquires the positions of the welding points; the control module constructs a detection path according to the positions of the welding points, and selects corresponding probes 4 according to the sizes of the welding points; the control module controls the probes 4 to move according to the detection path to detect all the welding points; wherein the method for acquiring the positions of the welding points comprises: a control module constructs a coordinate system, the projections of all the welding points are located in the first quadrant of the coordinate system, and the coordinates of all the welding points in the coordinate system are acquired, so that all the welding points are detected according to the detection path, all the welding points are detected in order, the repeated detection of the welding points is avoided, and the detection efficiency of the welding points is improved.

[0081] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection” and “connection” should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0082] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships as shown by the drawings, and are merely used to facilitate description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise explicitly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments. Thus, the above discussion is not intended to limit the present application.

[0083] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "above", "upper", and the like, can be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the drawings. In addition to the orientation depicted in the drawings, the spatially relative terms can be intended to encompass different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as "below" or "under" the other element or feature would be oriented "above" the other element or feature. Therefore, the example term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0084] With the above-mentioned ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can certainly make various changes and modifications within the scope of not deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A method for detecting a welding spot of a power battery, characterized in that, The method comprises the following steps: The control module obtains the size of all the welding points through image recognition, and obtains the position of the welding points; The control module constructs a detection path according to the position of the welding points, and selects a corresponding probe (4) according to the size of the welding points; The control module controls the movement of the probe (4) according to the detection path to detect all the welding points; The method for obtaining the position of the welding points comprises: The control module constructs a coordinate system, and the projections of all the welding points are located in the first quadrant of the coordinate system, and obtains the coordinates of all the welding points in the coordinate system; The method for constructing a detection path according to the position of the welding points comprises: In the same size welding points, the control module judges the number of center points on the same X axis and the number of center points on the same Y axis according to the coordinates of the center points, if the number of center points on the same Y axis is more than the number of center points on the same X axis, the detection path is a vertical S path from the starting point, and the next welding point in the detection path is the welding point with the minimum Y axis coordinate difference and the minimum distance from the center point of the current welding point. If the number of center points on the same X axis is more than the number of center points on the same Y axis, the detection path is a horizontal S path from the starting point, and the next welding point in the detection path is the welding point with the minimum X axis coordinate difference and the minimum distance from the center point of the current welding point. If the number of center points on the same X axis is the same as the number of center points on the same Y axis, the detection path is a horizontal S path or a vertical S path from the starting point, and if the horizontal S path is used, the next welding point in the detection path is the welding point with the minimum Y axis coordinate difference and the minimum distance from the center point of the current welding point, and if the vertical S path is used, the next welding point in the detection path is the welding point with the minimum X axis coordinate difference and the minimum distance from the center point of the current welding point.

2. The power battery welding point detection method according to claim 1, wherein: If the sizes of all the welding points are the same, and the size of the welding point is matched with the probe (4), the starting point of the detection path corresponding to all the welding points is that the control module obtains the vertical distance between the point closest to the Y axis of each welding point and the Y axis, and the welding point with the shortest distance is taken as the starting point of the detection path, and if there are at least two welding points with the shortest distance, the welding point farther from the X axis is taken as the starting point.

3. The power battery welding point detection method according to claim 1, wherein: ​ If there are at least two sizes of welds in all welds, and all kinds of welds are matched with corresponding probes (4), the control module classifies all welds by weld size category, each category of welds has a corresponding detection path, and the control module obtains the distance between the point closest to the Y-axis on each weld and the Y-axis, takes the weld with the shortest distance as the starting point, if there are at least two welds with the shortest distance, takes the weld with the farther distance from the X-axis as the starting point, takes the detection path corresponding to the weld category at the starting point as the first detection path, after the detection path ends, takes another kind of weld closest to the last weld on the detection path as the next detection path, and so on until all kinds of welds corresponding detection paths are traversed.

4. The power battery weld detection method of claim 3, wherein: If there are several welds with a size smaller than the preset minimum size in all welds, the control module determines the distance between two adjacent welds with a size smaller than the preset minimum size, if the distance is greater than the preset maximum distance, the control module sends an alarm message, if not, all welds with a size smaller than the preset minimum size are detected as one weld, and the remaining other welds construct corresponding detection paths.

5. The power battery weld detection method of claim 3, wherein: If there are welds with a size greater than the preset maximum size in all welds, the control module controls the probe (4) corresponding to the preset maximum size of the weld to detect the weld with a size greater than the preset maximum size, and in the process of detecting the weld with a size greater than the preset maximum size, the probe (4) performs S-shaped scanning on the surface of the weld to cover the weld, and the control module constructs detection paths corresponding to each size of weld to traverse all welds.

6. A power battery welding spot detection system using the power battery welding spot detection method according to any one of claims 1-5, characterized in that, Comprising: an acquisition module configured to acquire the size of all welds through image recognition, and acquire the position of the weld; a path module configured to construct a detection path according to the position of the weld, and select a corresponding probe (4) according to the size of the weld.

7. A computer readable storage medium having stored thereon computer programs / instructions, characterized in that, The computer program / instructions are executed by the processor to implement the steps of the power battery weld detection method of any one of claims 1-5.

8. A computer program product comprising computer programs / instructions, characterized in that, The computer program / instructions are executed by the processor to implement the steps of the power battery weld detection method of any one of claims 1-5.

9. A power cell weld spot detection apparatus, characterized by, Comprising: a control module, a moving mechanism, a rotating mechanism (1), and a plurality of size probes (4) electrically connected to the control module; the rotating mechanism (1) is arranged on the moving mechanism; the probe (4) is arranged on the rotating mechanism (1), and the control module is adapted to control the rotating mechanism (1) to rotate so that the corresponding probe (4) faces downward; the control module is adapted to control the probe (4) facing downward to detect the weld; the control module is configured to obtain the detection path by the power battery weld detection method of any one of claims 1-5 to control the moving mechanism to move the rotating mechanism (1) so that the corresponding probe (4) detects the weld.

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